CN2531972Y

CN2531972Y - Electromagnetic driven rear-viewing mirror wiper for car

Info

Publication number: CN2531972Y
Application number: CN 02202372
Authority: CN
Inventors: 郭明星
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-16
Filing date: 2002-01-16
Publication date: 2003-01-22
Anticipated expiration: 2012-01-16

Abstract

Disclosed is a solenoid driven automobile rearview mirror wiper, comprising a 12V DC power source for vehicles, a switch, a multivibrator type oscillator with a oscillating frequency of 60-75times/min and a conduction-cutoff time ratio of 1:1, a relay with a changeover contact, two electromagnets, a wiper arm, a wiper arm shaft, a wiper arm pull back spring, a wiping parcel and a water wiper installation soleplate, wherein the two electromagnets are symmetrically arranged at the two sides of the wiper arm and each electromagnet comprises two excitation winding units which can generate opposite magnetic line of force. The two excitation winding units that can enable the two movable iron cores to move towards each other or away from each other simultaneously are connected in parallel and then are connected with the two static contacts of the relay whose moveable contacts are connected with the power source together with the oscillator through the switch. The magnetizing coil of the relay is under the control the oscillator and the wiper arm is arranged on the wiper arm shaft. The wiping parcel is inserted in the wiper arm and the stop site of the wiping parcel is controlled by the pull back spring which is hung at the top of the wiper arm. The two moveable iron cores of the two electromagnets are respectively connected to the wiper arm which is symmetric at the two sides of the wiper arm shaft through levers. The water wiper is installed on the installation soleplate.

Description

Electromagnetic drive type automobile rearview mirror Windshield Wiper

The utility model relates to a kind of Windshield Wiper, particularly relates to a kind of electromagnetic drive type automobile rearview mirror Windshield Wiper by transistor controls.

Traditional automobile water wiper comprises DC motor, retarder, crank rocker, scraping arm and scraping blade composition, with the DC motor is to drive power, worm and gear by retarder slows down to increase and turns round, make rotatablely moving of electrical motor become hunting motion by quadric linkage again, and scraping arm and scraping blade are linked, to reach the purpose of scraping water, in this Windshield Wiper, owing to need rotatablely moving of electrical motor is transformed into hunting motion, so cause the transmission device complexity, and DC motor itself comprises compositions such as armature loop, carbon brush, permanent magnet, bearing.Actuating device is more complicated also.There is the stop position of scraping blade to control again by a separate part.Comprehensive above-mentioned some, traditional automobile water wiper complex structure causes fault rate to raise.In case et out of order can only be changed parts or assembly, and service expenditure is increased.And drive merit, transmission and the working part structure of traditional automobile water wiper disperse, and are unsuitable for the requirement of scraping water and installation to the frequent adjustment component of these need of automobile rearview mirror.

The back mirror of big-and-middle-sized automobile is installed on the independent support that is connected with car body, and without any barrier.Even such structure also can be caught in the rain back mirror under steam, cause blurred vision, and directly influence traffic safety.Based on consideration in this respect, the purpose of this utility model provides a kind of novel Windshield Wiper, and it has compared with prior art overcome the existing problem of traditional Windshield Wiper and the shortcoming that are proposed in the preamble background technology.The purpose of reach simplified structure, reduce fault rate, convenient installation being adjusted is finally to reach the purpose that helps traffic safety.

In order to achieve the above object, the related electromagnetic drive type automobile rearview mirror Windshield Wiper of the utility model comprises power supply, switch, oscillator, relay, electromagnet (two), scraping arm, scrapes arm axle, scraping arm pull back spring, scraping blade and Windshield Wiper install base plate.Described Windshield Wiper is to utilize the crank motion direct drive scraping arm of the movable core in the electromagnetism work to swing sideward moving.The influence that position of rear view mirror is caused for the vibration of avoiding movable core to produce in crank motion has adopted two movable cores in two opposed electromagnet to do simultaneously in opposite directions or the mode of opposing motion drives, and the vibration that self produces cancelled out each other.The technical parameter and the scantling of structure of two electromagnet are identical, and the opposed scraping arm both sides that are installed in.Each electromagnet comprises two sharp windings that can produce the opposite sense magnetic line of force, to replace when excitatory, makes the movable core can crank motion.Can make movable core in two electromagnet do simultaneously in opposite directions or per two field windings of opposing motion (in each electromagnet each) each and be unified into one group.

The stop position of scraping arm is controlled by pull back spring, and the limited load of the work of pull back spring can restrain and use the movable core self gravitation, and makes scraping blade be flapped toward a side at an easy rate.Make two electromagnetic torques that field winding produced that are in parallel of movable core motion be greater than two electromagnetic torques that field winding produced that are in parallel in addition so overcome the pull back spring pulling force.

Moving for scraping blade is at the uniform velocity swung sideward, its oscillation frequency of oscillator that electromagnetic drive type automobile rearview mirror Windshield Wiper of the present utility model is adopted is (not having steady) multi-vibrator of 60-75 time/min.Its conducting and the time ratio that ends are 1: 1, so this oscillator replaces for two groups of field windings that the excitatory time will equate so that movable core crank motion and requirement that scraping blade is at the uniform velocity swung adapts at the uniform velocity.But oscillator only just has oscillating current output when conducting, does not have oscillating current output when ending, and can not play to replace excitatory effect.So between oscillator and two groups of field windings, install a relay that has changeover contact again additional, two groups of field windings replaced excitatory purpose to reach.This relay alternately provides exciting current to two groups of field windings under the control of 1: 1 the oscillating current that oscillator sends.

Open a mounting hole on the scraping arm and it is installed on and scrape on the arm axle by this hole, two movable cores in two electromagnet respectively are connected in mounting hole bilateral symmetry place on the scraping arm by a serpentine connecting rod, so that two movable cores are being done in opposite directions or during opposing motion and scraping arm is flapped toward a side.According to the different needs of various automobile rearview mirror specifications, can the peg graft scraping blade of different size of the scraping arm of the utility model Windshield Wiper, and can correspondingly change the size of the pendulum angle of scraping blade by the connection location that changes connecting rod and scraping arm.

The utility model Windshield Wiper is installed on the base plate, and easily Windshield Wiper is installed on the back mirror by this base plate.

Related its principle of work of electromagnetic drive type automobile rearview mirror Windshield Wiper of the utility model is as follows: close switch, when the oscillator conducting, there is electric current to pass through in the magnetizing coil of relay, make a moving contact and a break back contact closure in the relay, electric current enters in the one group of field winding that is in parallel of two electromagnet that are connected with this break back contact through these two contacts, and produce electromagnetic torque and attract two movable cores to do simultaneously in opposite directions or opposing motion, drive the scraping arm scraping blade and swing aside; When oscillator becomes off condition, there is not electric current to pass through in the magnetizing coil of relay, thereby open original closed dynamic and static contact, moving contact and another break back contact closure, electric current enters in another group field winding that is in parallel of two electromagnet that are connected with this break back contact through this break back contact again, and produce electromagnetic torque and attract movable core to make opposing or move toward one another simultaneously, drive the scraping arm scraping blade and swing to opposite side.So repeatedly, under the control of the oscillating current of oscillator output, relay alternately provides exciting current to two groups of field windings, makes the movable core crank motion and drive the scraping arm scraping blade to swing sideward movingly, reaches the purpose of scraping water.When Windshield Wiper is quit work, off switch, current cut-off, scraping arm are flapped toward a side under the effect of pull back spring, do not observe sight line and do not influence it because of arbitrarily swing obstruction of Vehicular vibration.

The related electromagnetic drive type automobile rearview mirror Windshield Wiper of the utility model has adopted aforesaid technical scheme, has reached simplified structure, reduces fault rate, conveniently installed, wiper is effective, improves the purpose of a driving safety in rainy season.

The utility model will and be described in detail in conjunction with the accompanying drawings by specific embodiment.

Fig. 1 is the constructional drawing of electromagnetic drive type automobile rearview mirror Windshield Wiper assembly of the present utility model

Fig. 2 is the subjectivity figure and the left view of electromagnet front end cover among Fig. 1

Fig. 3 is the front view and the left view of yoke among Fig. 1

Fig. 4 is the front view and the left view of scraping arm among Fig. 1

Fig. 5 is a constructional drawing of adjusting the adjusting mechanism of pressure between scraping blade and back mirror surface

Fig. 6 is the constructional drawing of the installation base plate of the utility model Windshield Wiper

Comprise power supply 1 with reference to the described Windshield Wiper of Fig. 1, for automobile-used 12V direct supply, switch 2, oscillator 3, relay 4, electromagnet 5, scraping arm 6, scrape arm axle 7, pull back spring 8, scraping blade 9, pressing plate 24.Described oscillator 3 is mainly by transistor T ₁, T ₂, resistance R ₁-R ₄, cond C ₁, C ₂Form a typical case (not having steady) multi-vibrator.T wherein ₁, T ₂Be same model, R ₁=R ₄, R ₂=R ₃, C ₁=C ₂Aerotron T ₃Be a bigger power tube, play on-off action." the B of oscillator 3 ₊" binding post succeeds "+" binding post (magnetizing coil binding post) of electrical equipment 4, in order to the moving contact K in the control relay 4 ₁With two break back contact K ₂, K ₃Disconnection and closure.Moving contact K ₁Join by the switch 2 and power supply "+" utmost point with "+" binding post of oscillator 3.Break back contact K ₂, K ₃By two-wire connector 20 respectively be wrapped in yoke 12 on field winding 10,11 be connected.Can make two movable cores 15 do simultaneously in opposite directions or per two field windings of opposing motion each and be unified into one group.The magnetic line of force direction of field winding 10 is towards rear side housing 13, and the self gravitation that can overcome yoke 12 in-to-in movable cores 15 to its electromagnetic torque that carries out producing when excitatory makes the scraping blade swing.The magnetic line of force direction of field winding 11 is towards front end cover 14, and the self gravitation that can overcome movable core 15 to its electromagnetic torque that carries out producing when excitatory swings scraping blade with the pulling force sum of pull back spring 8.So the number of turn of field winding 11 is more than the number of turn of field winding 10.The outside face suit protection overcoat 19 of yoke 12, front end cover 14 and rear side housing 13 are equipped with in two ends.Front end cover 14 has centre hole.Two end cap outside welding hanging feet 16,17, damper spring sheet 18 is equipped with in the inboard.The length of movable core 15 equals half of its stroke.Connecting rod mounting hole 31 on the scraping arm 6 is connected with a serpentine connecting rod 21, and the other end of connecting rod 21 adopts screw thread to spin by the centre hole and the movable core 15 of front end cover 14.The hole 22 on scraping arm 6 tops is used to articulate pull back spring 8, and the other end of pull back spring 8 is mounted on the link 23 that is welded on the front end cover 14.The pressing plate 24 that is used to adjust scraping blade 9 and back mirror surface pressure is installed on simultaneously with scraping arm 6 scrapes arm axle 7.

Damper spring sheet 18 is used to avoid movable core 15 to be the bump front and rear cover and to have centre hole 27 at crank motion among Fig. 2, this hole overlaps fully with the centre hole of front end cover 14, be fixed on the front end cover 14 by screw 26, rear side housing 13 and the damper spring sheet that is mounted thereon do not have mesopore.25 one-tenth circumference rectangular distributions of mounting hole are fixed on yoke 12 two ends by this mounting hole with end cap with screw.

Field winding 10,11 is wrapped on the yoke 12 in whole front views of yoke 12 shown in Figure 3, inlay 6 on the inwall of yoke 12 and becoming circumference well-distributed steel band 28, in order to reduce the area of contact of movable core 15 and yoke 12 inwalls, to reach the purpose that reduces friction drag and noise.

Have mounting hole 30 on the scraping arm 6 shown in Figure 4, and locate to be in line that in 30 two symmetries of mounting hole the connecting rod of three bar shapeds mounting hole 31 is respectively arranged.When need adjusting pendulum angle big or small of scraping arm 6, connecting rod 21 is selected for use apart from the near more connecting rod mounting hole 31 of mounting hole 30, and then the pendulum angle of scraping arm 6 is big more, otherwise more little.Because connecting rod 21 becomes axial linear movement with movable core 15 crank motions the time, and scraping arm 6 becomes lonely line motion in swing, be this movement interference of harmony, thus connecting rod mounting hole 31 is made bar shaped, and hole length equals the height of the arc that scraping arm 6 forms in swing.Most automobile rearview mirrors are oblong, for improving the effect and the area of wiper to greatest extent.Riveted joint one steel disc 29 between scraping arm 6 that has carried out 90 degree torsional deformations respectively and plug 32 is so that scraping arm 6 elastic deformation by steel disc 29 in swing makes scraping blade 9 parallel with two long limits of back mirror.

Pressure adjustmenting mechanism shown in Figure 5 comprises pressing plate 24, spacer 33, pad 34, spring 35, adjustment nut 36, jam nut 37, scrapes arm axle 7.Pressing plate 24 is installed on the scraping arm 6, and 34 antifriction functions of pad, spring 35 can make pressing plate 24 remain pressure to scraping arm 6, and adjusts the pressure of pressing plate 24 by the screw-in (going out) of adjustment nut 36, and locks with jam nut 37.Because the plane of steel disc 29 is vertical with the plane of scraping arm 6, the pressure action direction of pressing plate 24 is vertical with the permission bending direction of steel disc 29, so the pressure of pressing plate 24 can pass to scraping blade 9 by steel disc 29.Scraping arm 6 all is loaded in the same plane that base plate (office's cloth) 38 is installed with electromagnet 5, but connecting rod 21 is to axially move in the centre hole of front end cover 14, with scraping arm 6 not at sustained height, so, install the spacer 33 that a length equals the radius of front end cover 14 additional at installation base plate 38 and 6 of scraping arms, in this scheme, pressure adjustmenting mechanism all is installed on to be scraped on the arm axle 7.

Installation base plate shown in Figure 6 be one to be welded on the left-right symmetric parts that arm axle 7 is the center of scraping on " C " font metallic support 39.Plastics sucker 43 is used for fixing back mirror and is bonded on the support 39, the corresponding anti-slip rubber pad 44 that is bonded on the metal supporting plate 45 that caves at the back side of the opening direction of plastics sucker 43.Owing to when adjusting the pendulum angle of scraping arm 6, correspondingly will change the position of electromagnet 5, so it is the camber line shape hole in the center of circle that mounting hole 41 is made with mounting hole 40.And mounting hole 40 and 41 centre distance equal the hanging feet 16 of electromagnet 5 and 17 centre distance.When Windshield Wiper was installed, the hanging feet 16,17 of electromagnet 5 was installed mounting hole 40, the 41 corresponding installations of base plate respectively with this, and fixing with screw and nut 42.When Windshield Wiper is loaded on automobile rearview mirror, plastics sucker 43 is close to the back mirror front, anti-slip rubber pad 44 is close to the back mirror back side.Screw in the screw 47 on the support 39 then, until back mirror is clamped, at last with nut 46 lockings.

Claims

1, a kind of electromagnetic drive type automobile rearview mirror Windshield Wiper contains power supply (1), oscillator (3), the relay (4) that has changeover contact, two electromagnet (5), scraping arm (6), pressing plate (24), scraping blade (9), with Windshield Wiper base plate (38) is installed, it is characterized in that: the oscillation frequency of described oscillator (3) is 60-75 time/min, conducting is 1: 1 with the time ratio that ends, the technical parameter and the scantling of structure of described two electromagnet (5) are identical, and symmetry is opposite to scraping arm (6) both sides, the yoke (12) of each electromagnet (5) goes up two field windings (10) and (11) that winding can produce opposite sense magnetic line of force and different electromagnetic torques, the excitatory magnetic line of force direction of group (10) of watering is towards rear side housing (13), the magnetic line of force direction of field winding (11) is towards rear side housing (14), can make two movable cores (15) do simultaneously in opposite directions or two electromagnet (5) of opposing motion in per two field windings (in each electromagnet each) and be unified into a group, two groups of field windings (10) after the parallel connection are connected with (K3) with the break back contact (K2) of relay (4) respectively by two-wire connector (20) with (11), carry out excitatory to field winding (10), this field winding produces electromagnetic torque, overcome the self gravitation of movable core (15), scraping blade (6) is swung aside, carry out excitatory to field winding (11), this field winding produces electromagnetic torque, overcomes the self gravitation of movable core (15) and the pulling force sum of pull back spring (8) scraping blade (6) is swung to opposite side.

2, electromagnetic drive type automobile rearview mirror Windshield Wiper according to claim 1, it is characterized in that: power supply (1) is automobile-used 12V direct supply, positive pole connects switch (2), the electric current of moving contact (K1) in switch (2) while control generator (3) and the relay (4), the emitter of aerotron T3 is succeeded "+" binding post of electrical equipment (4) in the oscillator (3).

3, electromagnetic drive type automobile rearview mirror Windshield Wiper according to claim 1, it is characterized in that: scraping arm (6) has mounting hole (30), the connecting rod mounting hole (31) of 6 bar shapeds is in line and is distributed in symmetrically and evenly on the scraping arm (6) of mounting hole (3) both sides, the connecting rod mounting hole (31) of mounting hole (30) both sides each adopt screw thread to spin by two front end covers (14) respectively at two movable cores (15) by one " S " type connecting rod, end cross-sectional torsional deformation 90 degree of scraping arm (6) and plug (32), and be riveted on the two ends of elastic steel sheet (29) respectively, when Windshield Wiper quits work, the working ultimate load of pull back spring (8) can overcome the self gravitation of movable core (15), makes scraping blade be flapped toward a side.

4, according to the described electromagnetic drive type automobile rearview mirror of claim 1 Windshield Wiper, it is characterized in that: the front end cover (14) of electromagnet (5) has centre hole, hanging feet (17) and link (23) before the edge welding in the outside of end cap, rear side housing (13), outer ledge welding back hanging feet (16), the two end cap installed inside is by the fixing damper spring sheet (18) of screw (26), and the inwall of yoke (12) is inlaid with into 6 steel bands of circumference well-distributed (28).

5, electromagnetic drive type automobile rearview mirror Windshield Wiper according to claim 1, it is characterized in that: pressing plate (24) is pressed on the scraping arm (6), and be loaded on simultaneously and scrape on the arm axle (7), scraping arm (6) and install and to adorn a length between base plate (38) and wait until in the spacer (33) of end cap (14) radius is adorned a spring (35) and is placed pad (34) and the adjustment nut (36) and the jam nut (37) at spring (35) two ends on the pressing plate (24).

6, electromagnetic drive type automobile rearview mirror Windshield Wiper according to claim 1, it is characterized in that: Windshield Wiper is installed base plate (38), to scrape arm axle (7) is center and left-right symmetric, scrape arm axle (7) and be welded on one " C " font support (39) downside, plastics sucker (43) is adhered to the offside of support (39), have arc mounting hole (41) and circular mounting hole (40) on the support (39), the centre distance in two holes equal electromagnet (5) before, back hanging feet (16), (17) centre distance, the offside of plastics sucker (43) opening direction is equipped with the anti-slip rubber pad (44) on the metal supporting plate (45) that is bonded in back side depression, the cooresponding support of supporting plate (45) (39) is gone up the punching tapping, screw in screw (47), be rotary with a jam nut (46) on the screw (47).